JPH08201501A - Electric wave source locating device - Google Patents
Electric wave source locating deviceInfo
- Publication number
- JPH08201501A JPH08201501A JP879495A JP879495A JPH08201501A JP H08201501 A JPH08201501 A JP H08201501A JP 879495 A JP879495 A JP 879495A JP 879495 A JP879495 A JP 879495A JP H08201501 A JPH08201501 A JP H08201501A
- Authority
- JP
- Japan
- Prior art keywords
- radio wave
- time difference
- radiation source
- point
- source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電波放射源が放射する
電波を一地点のみで受信して、電波放射源の位置を求め
ることができる電波源位置標定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio wave source position locating device capable of determining the position of a radio wave radiation source by receiving a radio wave emitted from a radio wave radiation source only at one point.
【０００２】[0002]
【従来の技術】従来の電波放射源位置標定装置は、互い
に離隔した複数の地点で、それぞれ電波の到来方向を測
定し、電波の到来方向の交点から電波放射源の位置を求
めていた。図４は従来の電波放射源位置標定装置の構成
を示すブロック図であり、また、図５は同標定装置にお
ける電波放射源位置標定方法の説明図である。図４に示
すように、互いに離隔した地点Ａ，Ｂにおいて、電波放
射源５からの到来波を受信し、方位測定装置１ａ，１ｂ
で基準方位に対するそれぞれの電波の到来方向θ１，θ
２（図５）を測定する。次に、方位測定装置１ａ，１ｂ
においてそれぞれ測定された方位データを、データ伝送
装置６ａ，６ｂを介して位置標定装置７に入力し、この
位置標定装置７において電波放射源５の位置を求める。2. Description of the Related Art A conventional radio wave radiation source position locating device measures the arrival directions of radio waves at a plurality of points separated from each other, and obtains the position of the radio wave emission source from the intersection of the arrival directions of radio waves. FIG. 4 is a block diagram showing a configuration of a conventional radio wave radiation source position locating device, and FIG. 5 is an explanatory view of a radio wave radiation source position locating method in the same locating device. As shown in FIG. 4, at the points A and B separated from each other, the incoming waves from the radio wave radiation source 5 are received, and the azimuth measuring devices 1a and 1b are received.
The arrival directions θ1 and θ of each radio wave with respect to the reference azimuth
2 (FIG. 5) are measured. Next, the azimuth measuring devices 1a and 1b
The azimuth data respectively measured in 1 is input to the position locating device 7 via the data transmission devices 6a and 6b, and the position of the radio wave radiation source 5 is obtained in this position locating device 7.
【０００３】この位置標定は、図５に示すように、地点
Ａ，Ｂでの方位データθ１，θ２に対する直線ＡＡ’，
ＢＢ’を描き、その交点Ｅを求める。この交点Ｅが求め
る標定位置となる。なお、この出願に関連する技術が記
載された公報として、特開平４−３４３８５号公報「電
波探知装置」、特開昭６１−２９２０７７号公報「方向
測定機の方向測定能力検査方式」等が知られている。As shown in FIG. 5, this position orientation is based on a straight line AA ', for the azimuth data θ1, θ2 at the points A, B.
Draw BB 'and find its intersection E. This intersection E is the determined position. It should be noted that as the publications that describe the technology related to this application, there are known Japanese Patent Application Laid-Open No. 4-34385, "Radio Detecting Device", Japanese Patent Application Laid-Open No. 61-292077, "Direction Measuring Ability Inspection Method for Direction Measuring Machines", and the like. Has been.
【０００４】[0004]
【発明が解決しようとする課題】上述したように、従来
の電波放射源位置標定装置においては、複数地点におい
て電波の到来方向を測定し、さらに、その測定結果を一
箇所に集める必要があった。このため、複数地点に、電
波を受信して方位を測定する方位測定装置が必要となる
とともに、離れた地点間のデータ伝送が必要となる。本
発明の目的は、一地点で電波を受信することで、電波放
射源の位置を求めることができる電波放射源位置標定装
置を提供することにある。As described above, in the conventional radio wave radiation source position locating device, it is necessary to measure the arrival directions of radio waves at a plurality of points and collect the measurement results at one point. . Therefore, an azimuth measuring device that receives radio waves to measure the azimuth is required at a plurality of points, and data transmission between distant points is required. An object of the present invention is to provide a radio wave radiation source position locating device capable of obtaining the position of a radio wave radiation source by receiving a radio wave at one point.
【０００５】[0005]
【課題を解決するための手段】この発明は、電波放射源
が放射する電波を標定位置において受信して電波放射源
の位置を標定する電波源位置標定装置において、電波放
射源からの電波を受信して到来方位を求める方位測定手
段と、電波放射源からの電波を反射させる電波反射手段
と、電波放射源から直接到来した電波と、電波反射手段
により反射して到来した電波の到来時間差を求める時間
差測定手段と、方位測定手段により求めた到来方位およ
び時間差測定手段により求めた到来時間差に基づいて電
波放射源の位置を標定する位置標定手段とを備えたこと
を特徴とするものである。ここで、電波反射手段は、予
め地上に設けた反射体であってもよく、また、地上の構
造物または自然物を利用してもよい。また、空中に気球
等を設け、その気球等に反射体を設置してもよい。ま
た、位置標定手段としては、例えば、標定位置から方位
測定手段が測定した方位の方向へ引いた仮想線上の点で
あって、標定位置からの距離と電波反射手段からの距離
の差が、時間差測定手段によって測定された時間差Δｔ
と、標定位置と電波反射手段の位置との間の電波伝搬時
間ｔ0との差（Δｔ−ｔ0）に対応する電波伝搬距離とな
る点を電波源位置として標定するものが用いられる。According to the present invention, there is provided a radio wave source position locating device for locating a position of a radio wave radiation source by receiving a radio wave radiated by a radio wave radiation source at a locating position, and receiving a radio wave from the radio wave radiating source. Then, the azimuth measuring means for obtaining the arriving direction, the radio wave reflecting means for reflecting the radio wave from the radio wave radiation source, the radio wave directly coming from the radio wave radiation source, and the arrival time difference between the radio waves reflected by the radio wave reflecting means and arriving It is characterized by comprising time difference measuring means and position locating means for locating the position of the radio wave radiation source based on the arrival direction obtained by the direction measuring means and the arrival time difference obtained by the time difference measuring means. Here, the radio wave reflection means may be a reflector provided on the ground in advance, or a structure on the ground or a natural object may be used. Further, a balloon or the like may be provided in the air and the reflector may be installed in the balloon or the like. As the position locating means, for example, a point on a virtual line drawn from the locating position in the direction of the azimuth measured by the azimuth measuring means, and the difference between the distance from the locating position and the distance from the radio wave reflecting means is the time difference. Time difference Δt measured by the measuring means
And a point where the radio wave propagation distance corresponds to the difference (Δt-t0) between the radio wave propagation time t0 between the orientation position and the position of the radio wave reflection means is used as the radio wave source position.
【０００６】[0006]
【作用】この発明によれば、標定位置と異なる場所に電
波反射手段を設け、電波放射源から直接到来した電波
と、電波反射手段により反射した後到来した電波との到
来時間差を求める。そして、求めた時間差と電波源の方
向から電波源位置を標定する。このような構成により、
複数地点に電波源の方向を測定する装置を設ける必要が
なくなり、一箇所における測定のみで電波源位置を標定
することが可能となる。また、上述した位置標定手段に
おいては、図２（ａ）に示す点Ａ（標定位置を示す）か
ら電波源の方位θ１に対応する直線ＡＡ’を引く。次
に、点Ａからと点Ｂ（電波反射手段の位置を示す）から
の距離差が時間（Δｔ−ｔ0）に対応する電波伝搬時間
となる双曲線ｂｂ’を描き、直線ＡＡ’と曲線ｂｂ’の
交点を求めれば、その交点Ｅが求める標定位置となる。According to the present invention, the radio wave reflecting means is provided at a place different from the orientation position, and the arrival time difference between the radio wave directly coming from the radio wave radiation source and the radio wave coming after being reflected by the radio wave reflecting means is obtained. Then, the position of the radio wave source is located from the obtained time difference and the direction of the radio wave source. With such a configuration,
It is not necessary to provide a device for measuring the direction of the radio wave source at a plurality of points, and it becomes possible to locate the radio wave source position only by measuring at one point. In the position locating means described above, a straight line AA 'corresponding to the azimuth θ1 of the radio wave source is drawn from the point A (indicating the locating position) shown in FIG. 2A. Next, draw a hyperbola bb 'in which the distance difference from point A to point B (indicating the position of the radio wave reflection means) is the radio wave propagation time corresponding to time (Δt-t0), and draw straight line AA' and curve bb '. If the intersection point is determined, the intersection point E becomes the determined position.
【０００７】[0007]
【実施例】以下、本発明の第１の実施例について図面を
参照して説明する。図１は本発明の第１の実施例の構成
を示すブロック図、図２は電波放射源位置を求める方法
を説明するための図である。図１において、地上のある
地点Ａに設置された方位測定装置１は、地上の電波放射
源５からの到来波を受信し、基準方位に対する電波の到
来する方向θ１（図２参照）を測定する。そして、その
測定した方向θ１を位置標定装置４へ出力する。電波反
射体２は、電波放射源５から到来する電波を地点Ａへ向
けて反射させるもので、特別に反射板等を設けてもよ
く、あるいは、ビル等の建築物や山岳、丘陵等の自然物
を利用してもよい。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention, and FIG. 2 is a diagram for explaining a method of obtaining a radio wave radiation source position. In FIG. 1, an azimuth measuring device 1 installed at a certain point A on the ground receives an incoming wave from a radio wave radiation source 5 on the ground, and measures a direction θ1 (see FIG. 2) of an incoming radio wave with respect to a reference azimuth. . Then, the measured direction θ1 is output to the position locating device 4. The radio wave reflector 2 reflects the radio wave coming from the radio wave radiation source 5 toward the point A, and may be provided with a special reflection plate or the like, or a building such as a building or a natural object such as a mountain or a hill. May be used.
【０００８】時間差測定装置３は、電波放射源５から直
接到来する電波と、地上のある地点Ｂにある電波反射体
２で反射された後到来する電波とを各々受信し、両波の
到達時間差Δｔを測定する。そして、その到達時間差Δ
ｔを位置標定装置４へ出力する。位置標定装置４は、到
来方向θ１と時間差Δｔから電波放射源５の位置を算出
する。次に、図２（ａ）を参照して、位置標定装置４に
おける位置標定方法について説明する。まず、地点Ａを
示す点Ａから方位データθ１に対応する直線ＡＡ’を引
く。次に、点Ａからと点Ｂ（地点Ｂに対応）からの距離
差が一定となる双曲線ｂｂ’を描き、直線ＡＡ’と曲線
ｂｂ’の交点を求めれば、その交点Ｅが求める標定位置
となる。The time difference measuring device 3 receives the radio wave directly coming from the radio wave radiation source 5 and the radio wave coming after being reflected by the radio wave reflector 2 at a certain point B on the ground, and the arrival time difference between both waves is received. Measure Δt. Then, the arrival time difference Δ
The t is output to the position locating device 4. The position locating device 4 calculates the position of the radio wave radiation source 5 from the arrival direction θ1 and the time difference Δt. Next, a position locating method in the position locating device 4 will be described with reference to FIG. First, a straight line AA ′ corresponding to the azimuth data θ1 is drawn from the point A indicating the point A. Next, if a hyperbola bb ′ with a constant distance difference from the point A to the point B (corresponding to the point B) is drawn and the intersection of the straight line AA ′ and the curve bb ′ is obtained, the intersection E becomes the determined position. Become.
【０００９】すなわち、図２（ｂ）において、電波放射
源の位置をＥ’とすると、地点Ｅ’から放射された電波
は、直接地点Ａへ到達し、また、一部は地点Ｂの電波反
射体２で反射されて地点Ａへ到達する。いま、直接波の
到達時間をｔ1、反射波の到達時間をｔ2とすると、時間
差測定装置３により測定した時間差Δｔは、 Δｔ＝ｔ2−ｔ1 ‥‥‥ （１） となる。また、地点Ｅ’から地点Ｂまでの電波到達時間
をｔ2’、地点Ｂから地点Ａまでの電波到達時間をｔ0と
すれば、ｔ2は、 ｔ2＝ｔ2’＋ｔ0 ‥‥‥ （２） となる。上記第（１）式，第（２）式より、 ｔ2’−ｔ1＝Δｔ−ｔ0 ‥‥‥ （３） なる式が得られる。That is, in FIG. 2B, assuming that the position of the radio wave radiation source is E ', the radio wave radiated from the point E'directly reaches the point A, and a part of the radio wave is reflected at the point B. It is reflected by the body 2 and reaches the point A. Now, assuming that the arrival time of the direct wave is t1 and the arrival time of the reflected wave is t2, the time difference Δt measured by the time difference measuring device 3 is Δt = t2-t1 (1). Further, when the radio wave arrival time from the point E ′ to the point B is t2 ′ and the radio wave arrival time from the point B to the point A is t0, t2 is t2 = t2 ′ + t0 (2). From the equations (1) and (2), the equation t2'-t1 = Δt-t0 (3) is obtained.
【００１０】この第（３）式において、時間差Δｔは測
定値であり、電波放射源５および電波反射体２の位置が
変わらない限り一定値である。また、地点Ｂから地点Ａ
までの電波到達時間ｔ0 は地点Ａ，Ｂの位置が決まれば
一義的に求まる一定値である。したがって、上記第
（３）式の右辺が一定となり、この結果、第（３）式に
おける（ｔ2’−ｔ1）が一定となる。いま、地点Ａと地
点Ｅ’の距離をＡＥ’、地点Ｂと地点Ｅ’の距離をＢ
Ｅ’とし、電波の速度をＶ（一定値）とすると、 ＢＥ’−ＡＥ’＝Ｖ（ｔ2’−ｔ1）＝Ｖ（Δｔ−ｔ0）＝一定 ‥‥‥（４） なる式が成り立つ。すなわち、地点Ｅ’は、地点Ｂから
と地点Ａからの距離差が一定値 Ｖ（Δｔ−ｔ0） ‥‥‥ （５） となる地点であり、したがって、地点Ａ，Ｂを焦点とす
る双曲線上に位置することになる。この結果、前述した
ように、図２（ａ）に示す双曲線ｂｂ’上に地点Ｅ’が
存在することになり、直線ＡＡ’と双曲線ｂｂ’の交点
Ｅとして地点Ｅ’を求めることができる。In the equation (3), the time difference Δt is a measured value and is a constant value as long as the positions of the radio wave radiation source 5 and the radio wave reflector 2 do not change. Also, from point B to point A
The radio wave arrival time t0 up to is a constant value uniquely obtained when the positions of the points A and B are determined. Therefore, the right side of the equation (3) becomes constant, and as a result, (t2'-t1) in the equation (3) becomes constant. Now, the distance between point A and point E'is AE ', and the distance between point B and point E'is B.
Letting E ′ and the velocity of the radio wave be V (constant value), BE′−AE ′ = V (t2′−t1) = V (Δt−t0) = constant (4). That is, the point E'is a point where the distance difference between the point B and the point A is a constant value V (Δt-t0) (5), and therefore, on the hyperbola with the points A and B as the focal point. Will be located in. As a result, as described above, the point E'exists on the hyperbola bb 'shown in FIG. 2A, and the point E'can be obtained as the intersection E of the straight line AA' and the hyperbola bb '.
【００１１】次に、本発明の第２の実施例について説明
する。第１の実施例においては、電波放射源５、電波反
射体２及び方位測定装置１等が地上にある場合である
が、第２の実施例では、電波反射体２を方位測定装置１
の上空に気球等を利用して設置している。装置の全体構
成図は、第１の実施例と同一であるので記載を省略す
る。図３は、第２の実施例における位置標定方法を説明
するための図である。図３（ａ）は地上の平面図であ
り、地点Ｂは地点Ａに重なっている。図３（ｂ）は図３
（ａ）における面Ａ−Ｂ−Ａ’での断面を示す図であ
る。図３（ｂ）において、点Ａからと点Ｂからの距離差
が一定となる双曲線ｂｂ’を描き、直線ＡＡ’との交点
を求めれば、その交点Ｅが求める標定位置となる。Next, a second embodiment of the present invention will be described. In the first embodiment, the radio wave radiation source 5, the radio wave reflector 2, the azimuth measuring device 1 and the like are on the ground, but in the second embodiment, the radio wave reflector 2 is placed in the azimuth measuring device 1.
It is installed using a balloon etc. in the sky above. The overall configuration diagram of the apparatus is the same as that of the first embodiment, and therefore its description is omitted. FIG. 3 is a diagram for explaining the position locating method in the second embodiment. FIG. 3A is a plan view of the ground, and the point B overlaps with the point A. 3 (b) is shown in FIG.
It is a figure which shows the cross section in surface ABA 'in (a). In FIG. 3B, if a hyperbola bb 'where the distance difference from the point A to the point B is constant is drawn and an intersection with the straight line AA' is obtained, the intersection E becomes the obtained orientation position.
【００１２】[0012]
【発明の効果】以上説明したように、本発明によれば、
電波放射源から直接到来した電波と、電波反射手段によ
り反射した後到来した電波との到来時間差と、電波源の
方向とから電波源位置を標定するようにしたので、複数
地点に電波源の方向を測定する装置を設ける必要がな
く、一箇所における測定のみで電波源位置を標定するこ
とができる効果が得られる。また、一地点で位置標定を
することができるので、車両、艦船及び航空機等の移動
体からも容易に位置標定をすることができるという効果
が得られる。As described above, according to the present invention,
Since the position of the radio source is located based on the time difference between the arrival time of the radio wave directly coming from the radio wave radiation source and the radio wave coming after being reflected by the radio wave reflection means, and the direction of the radio wave source, the direction of the radio wave source can be determined at multiple points. It is not necessary to provide a device for measuring the radio wave, and the effect that the radio wave source position can be located only by measurement at one place can be obtained. Further, since the position can be located at one point, it is possible to obtain the effect that the position can be easily located even from a moving body such as a vehicle, a ship and an aircraft.
【図１】本発明の第１の実施例の構成を示すブロック図
である。FIG. 1 is a block diagram showing a configuration of a first exemplary embodiment of the present invention.
【図２】本発明の位置を求める方法を説明するための説
明図である。FIG. 2 is an explanatory diagram for explaining a method for obtaining a position of the present invention.
【図３】本発明の第２の実施例における位置を求める方
法を説明するための説明図である。FIG. 3 is an explanatory diagram for explaining a method for obtaining a position in the second embodiment of the present invention.
【図４】従来の電波源位置標定装置の構成を示すブロッ
ク図である。FIG. 4 is a block diagram showing a configuration of a conventional radio wave source position locating device.
【図５】従来の電波源位置標定装置における位置標定方
法の一例を説明するための説明図である。FIG. 5 is an explanatory diagram for explaining an example of a position locating method in a conventional radio wave source position locating device.
１……方位測定装置、２……電波反射体、３……時間差
測定装置、４……位置標定装置、５……電波放射源。1 ... Direction measuring device, 2 ... Radio wave reflector, 3 ... Time difference measuring device, 4 ... Position locating device, 5 ... Radio wave radiation source.
Claims (5)
おいて受信して前記電波放射源の位置を標定する電波源
位置標定装置において、 前記電波放射源からの電波を受信して到来方位を求める
方位測定手段と、 前記電波放射源からの電波を反射させる電波反射手段
と、 前記電波放射源から直接到来した電波と、前記電波反射
手段により反射して到来した電波の到来時間差を求める
時間差測定手段と、 前記方位測定手段により求めた到来方位および前記時間
差測定手段により求めた到来時間差に基づいて前記電波
放射源の位置を標定する位置標定手段とを備えたことを
特徴とする電波源位置標定装置。1. A radio wave source position locating device for locating the position of the radio wave radiation source by receiving the radio wave radiated by the radio wave radiation source at a locating position, and receiving the radio wave from the radio wave radiating source to obtain an arrival direction. Direction measuring means, radio wave reflecting means for reflecting radio waves from the radio wave radiation source, time difference measuring means for obtaining a time difference of arrival of radio waves directly coming from the radio wave radiation source and radio waves reflected by the radio wave reflecting means. And a position locating means for locating the position of the radio wave radiation source based on the arrival azimuth obtained by the azimuth measuring means and the arrival time difference obtained by the time difference measuring means. .
反射体であることを特徴とする請求項１記載の電波源位
置標定装置。2. The radio wave source position locating device according to claim 1, wherein the radio wave reflection means is a reflector provided on the ground in advance.
は自然物であることを特徴とする請求項１記載の電波源
位置標定装置。3. The radio wave source position locating device according to claim 1, wherein the radio wave reflection means is a ground structure or a natural object.
体であることを特徴とする請求項１記載の電波源位置標
定装置。4. The radio wave source position locating device according to claim 1, wherein the radio wave reflection means is a reflector provided in the air.
前記方位測定手段が測定した方位の方向へ引いた仮想線
上の点であって、 前記標定位置からの距離と前記電波反射手段からの距離
の差が、 前記時間差測定手段によって測定された時間差Δｔと、
前記標定位置と前記電波反射手段の位置との間の電波伝
搬時間ｔ０との差（Δｔ−ｔ０）に対応する電波伝搬距
離となる点を電波源位置として標定することを特徴とす
る請求項１〜４のいずれかの項記載の電波源位置標定装
置。5. The position locating means is a point on a virtual line drawn from the locating position in the direction of the azimuth measured by the azimuth measuring means, and the distance from the locating position and the distance from the radio wave reflecting means. The time difference Δt measured by the time difference measuring means,
2. A radio wave source position is located at a point having a radio wave propagation distance corresponding to a difference (Δt−t0) between a radio wave propagation time t0 between the orientation position and the position of the radio wave reflection means. The radio wave source position locating device according to any one of 4 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP879495A JPH08201501A (en) | 1995-01-24 | 1995-01-24 | Electric wave source locating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP879495A JPH08201501A (en) | 1995-01-24 | 1995-01-24 | Electric wave source locating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08201501A true JPH08201501A (en) | 1996-08-09 |
Family
ID=11702782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP879495A Pending JPH08201501A (en) | 1995-01-24 | 1995-01-24 | Electric wave source locating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08201501A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008122127A (en) * | 2006-11-09 | 2008-05-29 | Mitsubishi Electric Corp | Target position locating apparatus |
| JP2008298605A (en) * | 2007-05-31 | 2008-12-11 | Mitsubishi Electric Corp | Apparatus and method for estimating track |
| RU2503969C1 (en) * | 2012-05-03 | 2014-01-10 | Закрытое акционерное общество Научно-производственное предприятие "Спец-Радио" (ЗАО НПП "Спец-Радио") | Triangulation-hyperbolic method to determine coordinates of radio air objects in space |
| KR20160021721A (en) * | 2014-08-18 | 2016-02-26 | 더 보잉 컴파니 | Systems and methods for determining a position of a transmitter of a bistatic radar system |
| CN108415006A (en) * | 2018-02-27 | 2018-08-17 | 武汉大学 | A kind of non-cooperation shortwave radiation source wide-area distribution type shortwave net single antenna time-of-arrival loaction |
| RU2686481C1 (en) * | 2018-03-15 | 2019-04-29 | Акционерное общество "Концерн радиостроения "Вега" | Adaptive method of spatial identification of bearings with ground radio sources and system for implementation thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07151540A (en) * | 1992-07-10 | 1995-06-16 | Hiroyuki Yugawa | Method for measuring position |
-
1995
- 1995-01-24 JP JP879495A patent/JPH08201501A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07151540A (en) * | 1992-07-10 | 1995-06-16 | Hiroyuki Yugawa | Method for measuring position |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008122127A (en) * | 2006-11-09 | 2008-05-29 | Mitsubishi Electric Corp | Target position locating apparatus |
| JP2008298605A (en) * | 2007-05-31 | 2008-12-11 | Mitsubishi Electric Corp | Apparatus and method for estimating track |
| RU2503969C1 (en) * | 2012-05-03 | 2014-01-10 | Закрытое акционерное общество Научно-производственное предприятие "Спец-Радио" (ЗАО НПП "Спец-Радио") | Triangulation-hyperbolic method to determine coordinates of radio air objects in space |
| KR20160021721A (en) * | 2014-08-18 | 2016-02-26 | 더 보잉 컴파니 | Systems and methods for determining a position of a transmitter of a bistatic radar system |
| CN108415006A (en) * | 2018-02-27 | 2018-08-17 | 武汉大学 | A kind of non-cooperation shortwave radiation source wide-area distribution type shortwave net single antenna time-of-arrival loaction |
| RU2686481C1 (en) * | 2018-03-15 | 2019-04-29 | Акционерное общество "Концерн радиостроения "Вега" | Adaptive method of spatial identification of bearings with ground radio sources and system for implementation thereof |
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